I have these AFB0824GHE-R00 Fans in my hands, and I see that there are three wires on that fan. The + and -, and the third blue wire, which according to the datasheet's hint is a function wire?
I am not sure how to use it. If I let it floating, the fans work as normal (I connect + and - to 24V and they spin), and I havent connect the blue wire to any voltage potential, as I may fry the fans by mistake.
So is this a wire that activates a "function" mode of the fan?
Where should I connect this wire to enable this mode, and what this mode does?